2023/12/12 by Houot, Sabine, Cambier, Philippe, Deschamps, Marjolaine +16
#0 #AGRONOMIE #ESSAI QUALIAGRO #INDICATEUR ISMO
paper · doi:10.17180/6r07-v729
Urban composts constitute a valuable source of organic matter that can be used in agriculture, especially in areas where animal breeding has disappeared. Their use in agriculture is regulated through obligatory standards: NFU 44095 for sludge composts and NFU 44 051 for other organic amendments. These standards assure the innocuousness at short/medium term by limiting the concentrations in trace elements, in organic micropollutants, in pathogens and inerts. Some analytical methods of characterisation have been developed to predict their agronomic value. Long term field experiments are useful tools to evaluate the effects of repeated applications. From the results of the Qualiagro field experiment, the indicator ISMO seems valuable to predict the capacity of organic amendments at increasing soil organic matter contents. Repeated applications of composts have improved soil structure stability, stimulated soil microbial activity, and produced yields equivalent to mineral fertilization. The fluxes of trace elements have reached a few percents of initial soil contents before starting the experiment. After 10 years of experiment, no degradation of grain quality has been noticed nor accumulation of organic micropollutants in soil or sanitary degradation of soils.